Solid State table and AC powered portable Radios of the 70's
These are solid state semiconductor powered radios.
At the bottom of this page is a generic schematic of a "hot chassis"
solid state AM radio. Usually, these table sets are "hot chassis",
directly connected to the powerline. They use a high voltage audio
output transistor, and the rest of the set operates at the
usual lower voltages found in battery operated transistor portables.
The "cold chassis" sets (usually stereos, digital clock radios,
and the AC/battery portables) use a power transformer and operate at low
An Australian MW 230V AC transformer radio set: Calstan
My first stereo receiver, bought in 1972, cold chassis
Not collectable yet! AC/battery w/ 8 track
These next 13 GE radios are solid state "hot chassis" designs
GE model T2240H
The GE model 1284A set above needed its
high voltage audio output transistor replaced. Used an NPN bipolar transistor
from the switching power supply of a junked monochrome monitor to
replace it, worked fine.
If you have a GE radio like this one
that is dead, check the output transistor.
I've had several with bad output transistors.
This GE C1580Z is the 1284A
A hot chassis soild state radio
Attention, K-Mart shoppers! Blue light special! .
Not old enough to be collectable yet! Portable AC/battery.
This was my grandma's emergency radio, as she lived within
ten miles of a nuke plant.
Lafayette had a radio (similar to this Realtone) I almost bought
back in 1970 but I never did.
Realtone solid state "hot chassis"
AM/FM stereo tuner
A nice Sony 23 band shortwave luggable set:
This Truetone is virtually identical to my
brother's Lafayette set. He bought his
Nice solid state hot chassis AM/FM with scrolling dial and 6 gang (3 AM, 3 FM) tuning cap: